Allow user to download MKW Gecko Codes from mkwtas.com

[malleoz]

Codes available here: https://github.com/Hibyehello/mkwii-tas-codes

The Download Codes button in game properties in Dolphin should redirect to mkwtas.com to pull Gecko Codes for MKW.

• Determine which codes should be included
• Upload Codes to mkwtas.com
• Rewrite C++ code to allow for MKW to point to a different location than other games

[malleoz]

The C++ portion of this task is completely done, except for obviously switching the link to point to mkwtas.com when that is set up.

[vabold]

I propose we borrow code structural ideas from Slippi. Some examples from their ini are:

REQUIRED: Slippi Online
RECOMMENDED: Normal Lag Reduction
OPTIONAL: Widescreen 16:9

Borrowing this general structural idea and adding some categories of our own could be a good idea, as it provides an intuitive way for new TASers to see the tools they can work with, and to encourage/discourage them from using certain features (we would want to discourage them from using tools like Freefly, for example).